All Causes

There are many causes of global warming. Some of them are natural and some are caused by the human. First one is that Carbon Dioxide Emitted from Cars. Cars now are the most popular transport methods in the world. These are used gasoline and diesel. These fuels are producing carbon dioxide gas which is harmful to the environment. Another cause is that the natural disasters. One of natural disaster is the volcanoes. These volcanoes normally are inactive but when they become active, millions tones of harmful gases send to the atmosphere. Yet another cause is that the using of energy. A lot of people use energy but this energy is not use efficiently so the unused energy became a source of pollution.

http://volcanoes.usgs.gov/Imgs/Jpg/GasEffects/30410135-057_large.jpg